The matter _______people’s health surely requires ______ carefully.

Jack spends two hours _______________ his homework

It is said that Mr Wang has won first place in the English contest for teachers.—________ and ________ one day.

I think Lucy is the best dancer in the world. — I agree with you. No one can dance__________.

the period of recent terroristactivities, people _____ not to touch an unattended bag